From 5865f0c4b76a45e630ffc1899016ef99616b6fbf Mon Sep 17 00:00:00 2001
From: steven_carr <steven_carr>
Date: Thu, 4 May 2006 16:07:06 +0000
Subject: [PATCH] Client side support for PalmVNC/UltraVNC 'Server Side
 Scaling'

---
 libvncclient/rfbproto.c  | 49 +++++++++++++++++++++++++++++++++++++++-
 libvncclient/vncviewer.c | 23 ++++++++++++++++---
 rfb/rfbclient.h          |  3 +++
 3 files changed, 71 insertions(+), 4 deletions(-)

diff --git a/libvncclient/rfbproto.c b/libvncclient/rfbproto.c
index 33af0f8..fd6bdee 100644
--- a/libvncclient/rfbproto.c
+++ b/libvncclient/rfbproto.c
@@ -669,6 +669,27 @@ SendFramebufferUpdateRequest(rfbClient* client, int x, int y, int w, int h, rfbB
 }
 
 
+/*
+ * SendScaleSetting.
+ */
+rfbBool
+SendScaleSetting(rfbClient* client,int scaleSetting)
+{
+  rfbSetScaleMsg ssm;
+
+  if (client->appData.palmVNC)
+      ssm.type = rfbPalmVNCSetScaleFactor;
+  else
+      ssm.type = rfbSetScale;
+  ssm.scale = scaleSetting;
+  ssm.pad = 0;
+  
+  if (!WriteToRFBServer(client, (char *)&ssm, sz_rfbSetScaleMsg))
+    return FALSE;
+
+  return TRUE;
+}
+
 /*
  * SendPointerEvent.
  */
@@ -1132,6 +1153,32 @@ HandleRFBServerMessage(rfbClient* client)
     break;
   }
 
+  case rfbResizeFrameBuffer:
+  {
+    if (!ReadFromRFBServer(client, ((char *)&msg) + 1,
+                           sz_rfbResizeFrameBufferMsg -1))
+      return FALSE;
+    client->width = rfbClientSwap16IfLE(msg.rsfb.framebufferWidth);
+    client->height = rfbClientSwap16IfLE(msg.rsfb.framebufferHeigth);
+    client->MallocFrameBuffer(client);
+    SendFramebufferUpdateRequest(client, 0, 0, client->width, client->height, FALSE);
+    rfbClientLog("Got new framebuffer size: %dx%d\n", client->width, client->height);
+    break;
+  }
+
+  case rfbPalmVNCReSizeFrameBuffer:
+  {
+    if (!ReadFromRFBServer(client, ((char *)&msg) + 1,
+                           sz_rfbPalmVNCReSizeFrameBufferMsg -1))
+      return FALSE;
+    client->width = rfbClientSwap16IfLE(msg.prsfb.buffer_w);
+    client->height = rfbClientSwap16IfLE(msg.prsfb.buffer_h);
+    client->MallocFrameBuffer(client);
+    SendFramebufferUpdateRequest(client, 0, 0, client->width, client->height, FALSE);
+    rfbClientLog("Got new framebuffer size: %dx%d\n", client->width, client->height);
+    break;
+  }
+
   default:
     {
       rfbBool handled = FALSE;
@@ -1143,8 +1190,8 @@ HandleRFBServerMessage(rfbClient* client)
 
       if(!handled) {
 	char buffer[256];
-	ReadFromRFBServer(client, buffer, 256);
 	rfbClientLog("Unknown message type %d from VNC server\n",msg.type);
+	ReadFromRFBServer(client, buffer, 256);
 	return FALSE;
       }
     }
diff --git a/libvncclient/vncviewer.c b/libvncclient/vncviewer.c
index 1a9784e..c66e02d 100644
--- a/libvncclient/vncviewer.c
+++ b/libvncclient/vncviewer.c
@@ -201,9 +201,23 @@ static rfbBool rfbInitConnection(rfbClient* client)
   client->width=client->si.framebufferWidth;
   client->height=client->si.framebufferHeight;
   client->MallocFrameBuffer(client);
-  if (!SendFramebufferUpdateRequest(client,
-				    0,0,client->width,client->height,FALSE))
-    return FALSE;
+
+  if (client->appData.scaleSetting>1)
+  {
+      if (!SendScaleSetting(client, client->appData.scaleSetting))
+          return FALSE;
+      if (!SendFramebufferUpdateRequest(client,
+                                        0,0,
+                                        client->width/client->appData.scaleSetting,
+                                        client->height/client->appData.scaleSetting,FALSE))
+      return FALSE;
+  }
+  else
+  {
+      if (!SendFramebufferUpdateRequest(client,
+  				        0,0,client->width,client->height,FALSE))
+      return FALSE;
+  }
 
   return TRUE;
 }
@@ -232,6 +246,9 @@ rfbBool rfbInitClient(rfbClient* client,int* argc,char** argv) {
       } else if (i+1<*argc && strcmp(argv[i], "-quality") == 0) {
 	client->appData.qualityLevel = atoi(argv[i+1]);
 	j+=2;
+      } else if (i+1<*argc && strcmp(argv[i], "-scale") == 0) {
+        client->appData.scaleSetting = atoi(argv[i+1]);
+        j+=2;
       } else {
 	char* colon=strchr(argv[i],':');
 
diff --git a/rfb/rfbclient.h b/rfb/rfbclient.h
index 5a219a3..3454af4 100644
--- a/rfb/rfbclient.h
+++ b/rfb/rfbclient.h
@@ -89,6 +89,8 @@ typedef struct {
   int qualityLevel;
   rfbBool enableJPEG;
   rfbBool useRemoteCursor;
+  rfbBool palmVNC;  /* use palmvnc specific SetScale (vs ultravnc) */
+  int scaleSetting; /* 0 means no scale set, else 1/scaleSetting */
 } AppData;
 
 
@@ -239,6 +241,7 @@ extern rfbBool SendIncrementalFramebufferUpdateRequest(rfbClient* client);
 extern rfbBool SendFramebufferUpdateRequest(rfbClient* client,
 					 int x, int y, int w, int h,
 					 rfbBool incremental);
+extern rfbBool SendScaleSetting(rfbClient* client,int scaleSetting);
 extern rfbBool SendPointerEvent(rfbClient* client,int x, int y, int buttonMask);
 extern rfbBool SendKeyEvent(rfbClient* client,uint32_t key, rfbBool down);
 extern rfbBool SendClientCutText(rfbClient* client,char *str, int len);